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Measurement

Length, mass, area, time… Choosing sensible units and converting accurately — measurement is everywhere.

11 topics

  1. 01Metric Units & ConversionFrom millimeters to kilometers, every conversion is just multiplying or dividing by a power of ten.Lesson 1 of 11
  2. 02AreaHow many 1-by-1 tiles does it take to fill a shape? That count is the area.Lesson 2 of 11
  3. 03Triangle & Compound AreasA triangle is half a rectangle and compound shapes split apart — two ideas that unlock the next level of area.Lesson 3 of 11
  4. 04VolumeStart by counting cubes, end with the cuboid formula — from cubic centimeters to liters.Lesson 4 of 11
  5. 05Volume of Cylinders, Cones & SpheresCounting cubes stops at the box — cylinders, cones and spheres each bring one formula, and all three are relatives of the circle.Lesson 5 of 11
  6. 06Surface AreaUnfold the solid and add up every face — wrapping a gift, painting a can, wallpapering a room, all the same question.Lesson 6 of 11
  7. 07Time & Conversion60 seconds, 60 minutes, 24 hours — the units you use most refuse to be decimal.Lesson 7 of 11
  8. 08Telling TimeThe hour hand strolls, the minute hand dashes — learn how the two hands divide the work and every clock face opens up.Lesson 8 of 11
  9. 09TemperatureThe same water reads 25 on one scale and 77 on another — temperature has three rulers, each with its own conversion rules.Lesson 9 of 11
  10. 10Accuracy & PrecisionEvery measurement carries error — learn to read precision, count significant figures, and report honestly with "about" and "±".Lesson 10 of 11
  11. 11Scale DrawingsMaps and blueprints shrink the world by a fixed ratio — 1 unit on paper stands for 100 in real life.Lesson 11 of 11

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